Do ask your Dad for reference, because:
First: Islam rules that other "people of the Book" (i.e. Jews and Christians) are to be respected and left to worship their God. People of the Book are not considered infidels in the Koran. So, which infidels do you refer to?
Second: those who are not people of the Book are indeed considered ignorant, and are recommended to convert to Islam (the same way the Spanish conquistadors tried to convert the "savage" Native American people to the
Christian faith). There is nothing in the Koran about killing them, on the contrary:
If one amongst the Pagans ask thee for asylum, grant it to him, so that he may hear the word of Allah; and then escort him to where he can be secure. That is because they are men without knowledge.
(surah 9, verse 6)
The fact that numerous psychos claim it's their holy duty to kill infidels (meaning Christians and Jews) does not mean it's written in the Koran.
Third: Muslims do acknowledge that
Jesus is a messiah, although a lesser one than
Mohammed (and they believe he was resurrected):
That they said (in boast), "We killed
Christ Jesus the son of
Mary, the Messenger of Allah";- but they killed him not, nor crucified him, but so it was made to appear to them, and those who differ therein are full of doubts, with no (certain) knowledge, but only conjecture to follow, for of a surety they killed him not:-
(surah 4, verse 157)
Fourth: have you seen the movie "Gandhi" with
Ben Kingsley? I know it is boring, but there is a part where a bunch of Indians and an Englishman are travelling on the roof of the train. The Indians ask the English what his religion is, and upon hearing he is
Christian, one of them says: "I know a
Christian. He drinks blood". He sees the surprised face of the Englishman, and adds, "Yes, the blood of God, every
Sunday. Don't all Christians do that?" Point in mind -- religions can be misinterpreted, misrepresented and thus - greatly misunderstood.
On a side note - how do you get in the Muslim paradise? It sounds really appealing =o)